/* ===== 基础变量 ===== */
:root {
    --bg-primary: #1a3a1a;
    --bg-secondary: #2d5a2d;
    --bg-card: #3d6b3d;
    --bg-panel: rgba(30, 60, 30, 0.92);
    --accent-gold: #d4a843;
    --accent-gold-light: #e8c870;
    --accent-gold-dark: #b8922e;
    --text-primary: #f0e6d2;
    --text-secondary: #c4b896;
    --text-muted: #8a9a7a;
    --win-color: #4caf50;
    --lose-color: #f44336;
    --border-radius: 14px;
    --border-radius-sm: 10px;
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 20px rgba(212, 168, 67, 0.2);
    /* 动画速度倍率：normal=1, fast=0.5, instant≈0 */
    --anim-speed: 1;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

/* 移动端触摸优化：消除300ms点击延迟，禁止双击缩放 */
button, .menu-btn, .action-btn, .mahjong-tile, .back-btn,
.replay-btn, .room-item-join, .modal-close, .menu-tool-btn,
.hud-menu-btn, .primary-btn, .secondary-btn, .pause-action-btn {
    touch-action: manipulation;
    min-height: 44px;
    min-width: 44px;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

#app {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* ===== 屏幕管理 ===== */
.screen {
    position: absolute;
    inset: 0;
    padding: 16px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    transform: translateX(20px);
}

.screen.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(0);
    transition-delay: 0s;
}

/* 所有键盘可操作控件共享清晰焦点环，避免仅有 hover 状态。 */
:where(button, input, select, textarea, [tabindex]):focus-visible {
    outline: 2px solid var(--accent-gold-light);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px rgba(212, 168, 67, 0.2);
}

.hidden {
    display: none !important;
}

/* ===== 加载画面 ===== */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.6s ease;
}

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.loading-mahjong {
    font-size: 5rem;
    animation: bounce 1.5s ease infinite;
    filter: drop-shadow(0 4px 12px rgba(212, 168, 67, 0.3));
}

.loading-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-gold);
    margin: 16px 0 8px;
}

.loading-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin: 0 auto;
    overflow: hidden;
}

.loading-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-gold-dark), var(--accent-gold), var(--accent-gold-light));
    border-radius: 2px;
    animation: loadingProgress 1.5s ease forwards;
    box-shadow: 0 0 10px rgba(212, 168, 67, 0.3);
}

@keyframes bounce {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-15px) scale(1.05); }
}

@keyframes loadingProgress {
    0% { width: 0%; }
    50% { width: 60%; }
    100% { width: 100%; }
}

.menu-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 22px;
    background: var(--bg-card);
    border: 1px solid rgba(212, 168, 67, 0.15);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

.menu-btn:hover {
    background: var(--bg-secondary);
    border-color: rgba(212, 168, 67, 0.35);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-icon {
    font-size: 1.6rem;
    width: 40px;
    text-align: center;
}

.btn-text {
    font-size: 1.1rem;
    font-weight: 600;
}

.btn-desc {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.exp-text {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.exp-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 14px;
}

.exp-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-gold-dark), var(--accent-gold));
    border-radius: 3px;
    transition: width 0.5s ease;
}

.slider-value {
    font-size: 0.8rem;
    color: var(--accent-gold);
    width: 36px;
    text-align: right;
}

.advanced-content {
    overflow: hidden;
    transition: max-height 0.3s ease;
    max-height: 600px;
}

.advanced-content.collapsed {
    max-height: 0;
}

/* ===== 通用按钮 ===== */
.primary-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--accent-gold-dark), var(--accent-gold));
    border: none;
    border-radius: var(--border-radius-sm);
    color: #1a1a1a;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-top: 12px;
}

.primary-btn:hover {
    box-shadow: 0 4px 16px rgba(212, 168, 67, 0.3);
    transform: translateY(-1px);
}

.primary-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.secondary-btn {
    width: 100%;
    padding: 12px;
    background: var(--bg-secondary);
    border: 1px solid rgba(212, 168, 67, 0.2);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-top: 10px;
}

.secondary-btn:hover {
    border-color: var(--accent-gold);
}

/* ===== 返回按钮 ===== */
.back-btn {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 8px 14px;
    background: var(--bg-secondary);
    border: 1px solid rgba(212, 168, 67, 0.2);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition-fast);
    z-index: 10;
}

.back-btn:hover {
    border-color: var(--accent-gold);
    color: var(--text-primary);
}

/* ===== 页面头部 ===== */
.lobby-header {
    text-align: center;
    padding: 16px 0 20px;
    position: relative;
}

.lobby-header h2 {
    font-size: 1.4rem;
    color: var(--accent-gold);
}

/* ===== 联机大厅 ===== */
.network-config {
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    padding: 16px;
    margin: 0 auto 16px;
    max-width: 520px;
    border: 1px solid rgba(212, 168, 67, 0.1);
}

.config-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.config-row label {
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.config-row input {
    flex: 1;
    min-width: 160px;
    padding: 8px 10px;
    background: var(--bg-secondary);
    border: 1px solid rgba(212, 168, 67, 0.15);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
}

.config-row input:focus {
    border-color: var(--accent-gold);
}

.conn-status {
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 600;
    white-space: nowrap;
}

.conn-status.offline {
    background: rgba(244, 67, 54, 0.15);
    color: var(--lose-color);
}

.conn-status.connecting {
    background: rgba(255, 152, 0, 0.15);
    color: #ff9800;
}

.conn-status.online {
    background: rgba(76, 175, 80, 0.15);
    color: var(--win-color);
}

.config-hint {
    margin-top: 10px;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.config-hint code {
    background: rgba(0, 0, 0, 0.2);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', monospace;
    color: var(--accent-gold-light);
}

.lobby-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 520px;
    margin: 0 auto;
}

@media (max-width: 560px) {
    .lobby-content {
        grid-template-columns: 1fr;
    }
}

.room-section {
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    padding: 16px;
    border: 1px solid rgba(212, 168, 67, 0.1);
}

.room-section h3 {
    font-size: 1rem;
    color: var(--accent-gold);
    margin-bottom: 12px;
}

.room-config {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.room-config label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.room-config input,
.room-config select {
    padding: 8px 10px;
    background: var(--bg-secondary);
    border: 1px solid rgba(212, 168, 67, 0.15);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
}

.room-list {
    min-height: 80px;
    max-height: 200px;
    overflow-y: auto;
}

.room-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    margin-bottom: 8px;
    border: 1px solid rgba(212, 168, 67, 0.1);
    transition: var(--transition-fast);
}

.room-item:hover {
    border-color: rgba(212, 168, 67, 0.3);
}

.room-item-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.room-item-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.room-item-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.room-item-join {
    padding: 6px 14px;
    background: var(--accent-gold);
    border: none;
    border-radius: var(--border-radius-sm);
    color: #1a1a1a;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.room-item-join:hover {
    box-shadow: 0 2px 8px rgba(212, 168, 67, 0.3);
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 20px;
}

/* 房间内面板 */
.in-room-panel {
    max-width: 520px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.room-info-bar {
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    padding: 14px 16px;
    margin-bottom: 12px;
    border: 1px solid rgba(212, 168, 67, 0.1);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.room-code {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.room-code strong {
    font-size: 1.4rem;
    color: var(--accent-gold);
    letter-spacing: 2px;
    font-family: 'SF Mono', monospace;
}

.room-code-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.room-status {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.player-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.lobby-player {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    border: 1px solid rgba(212, 168, 67, 0.1);
}

.lobby-player.host {
    border-color: rgba(212, 168, 67, 0.3);
    background: linear-gradient(90deg, rgba(212, 168, 67, 0.08), var(--bg-panel));
}

.lobby-player.self {
    border-color: rgba(76, 175, 80, 0.3);
}

.lobby-player-avatar {
    font-size: 1.8rem;
}

.lobby-player-info {
    flex: 1;
}

.lobby-player-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.lobby-player-tag {
    font-size: 0.7rem;
    color: var(--accent-gold);
    margin-left: 6px;
}

.lobby-player-status {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.lobby-player-state {
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 600;
}

.lobby-player-state.connected {
    background: rgba(76, 175, 80, 0.15);
    color: var(--win-color);
}

.lobby-player-state.connecting {
    background: rgba(255, 152, 0, 0.15);
    color: #ff9800;
}

.room-actions {
    display: flex;
    gap: 10px;
    flex-direction: column;
}

.network-error {
    max-width: 520px;
    margin: 12px auto 0;
    padding: 12px 16px;
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid rgba(244, 67, 54, 0.3);
    border-radius: var(--border-radius-sm);
    color: #ff8a80;
    font-size: 0.85rem;
    text-align: center;
}

/* ===== 自定义模式 ===== */
.custom-content {
    max-width: 520px;
    margin: 0 auto;
}

.rule-section {
    margin-bottom: 20px;
}

.rule-section h3 {
    font-size: 1rem;
    color: var(--accent-gold);
    margin-bottom: 12px;
}

.mahjong-types {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.mahjong-type-card {
    background: var(--bg-panel);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.mahjong-type-card:hover {
    border-color: rgba(212, 168, 67, 0.3);
}

.mahjong-type-card.selected {
    border-color: var(--accent-gold);
    background: linear-gradient(135deg, rgba(212, 168, 67, 0.1), var(--bg-panel));
}

.type-icon {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.type-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.type-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.rule-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.rule-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--bg-panel);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
}

/* ===== 回放列表 ===== */
.replay-list {
    max-width: 520px;
    margin: 0 auto;
}

.replay-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px;
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    border: 1px solid rgba(212, 168, 67, 0.1);
}

.replay-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.replay-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.replay-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.replay-actions {
    display: flex;
    gap: 8px;
}

.replay-btn {
    padding: 6px 12px;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition-fast);
}

.replay-btn:first-child {
    background: var(--accent-gold);
    color: #1a1a1a;
}

/* ===== 成就 ===== */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 520px;
    margin: 0 auto;
}

.achievement-card {
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    padding: 14px;
    display: flex;
    gap: 12px;
    align-items: center;
    border: 1px solid rgba(212, 168, 67, 0.1);
    opacity: 0.6;
    transition: var(--transition-fast);
}

.achievement-card.unlocked {
    opacity: 1;
    border-color: rgba(212, 168, 67, 0.3);
}

.achievement-icon {
    font-size: 2rem;
}

.achievement-info {
    flex: 1;
}

.achievement-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.achievement-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.achievement-progress {
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    margin-top: 8px;
    overflow: hidden;
}

.achievement-progress-bar {
    height: 100%;
    background: var(--accent-gold);
    border-radius: 2px;
    transition: width 0.5s ease;
}

/* ===== 游戏界面 ===== */
.game-table {
    position: relative;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-radius: var(--border-radius);
    overflow: hidden;
    perspective: 1200px;
}

.player-area {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.player-area.top {
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
}

.player-area.left {
    left: 10px;
    top: 50%;
    transform: translateY(-50%) rotate(90deg);
}

.player-area.right {
    right: 10px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
}

.player-area.bottom {
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
}

.player-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-panel);
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 6px;
    transition: var(--transition-fast);
}

.player-info.current-turn {
    box-shadow: 0 0 12px rgba(212, 168, 67, 0.4);
    border: 1px solid var(--accent-gold);
}

.player-avatar {
    font-size: 1.2rem;
}

.player-name {
    font-weight: 600;
    white-space: nowrap;
}

.player-score {
    color: var(--accent-gold);
    font-weight: 700;
}

.hand-area {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
    max-width: min(90vw, 600px);
}

.melds-area {
    display: flex;
    gap: 6px;
    margin-top: 6px;
    flex-wrap: wrap;
    justify-content: center;
}

.meld-group {
    display: flex;
    gap: 2px;
    padding: 3px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
}

.table-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.discard-pile {
    width: min(50vw, 280px);
    height: min(30vh, 180px);
    background: rgba(0, 0, 0, 0.15);
    border-radius: var(--border-radius);
    padding: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-content: flex-start;
    overflow-y: auto;
    border: 1px solid rgba(212, 168, 67, 0.1);
}

.deck-info {
    display: flex;
    gap: 16px;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.wind-indicator {
    width: 36px;
    height: 36px;
    background: var(--accent-gold);
    color: #1a1a1a;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.round-info {
    font-size: 0.8rem;
}

/* 操作按钮 */
.action-bar {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.action-btn {
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--accent-gold-dark), var(--accent-gold));
    border: none;
    border-radius: var(--border-radius-sm);
    color: #1a1a1a;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-fast);
}

.action-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(212, 168, 67, 0.3);
}

.action-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.action-btn.secondary {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid rgba(212, 168, 67, 0.2);
}

/* ===== 模态框 ===== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 250;
    padding: 20px;
}

@keyframes modalIn {
    from { opacity: 0; transform: translateY(30px) scale(0.95); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-btn {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background: var(--bg-secondary);
    border: 1px solid rgba(212, 168, 67, 0.2);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.modal-btn:hover {
    border-color: var(--accent-gold);
    background: rgba(212, 168, 67, 0.08);
    transform: translateY(-1px);
}

.modal-btn:active {
    transform: translateY(0) scale(0.98);
}

/* ===== Toast ===== */
#toast-container {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: linear-gradient(135deg, rgba(30, 35, 45, 0.96), rgba(20, 25, 35, 0.98));
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 500;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(212, 168, 67, 0.15);
    border-left: 4px solid var(--accent-gold);
    animation: toastIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards, toastOut 0.3s ease 2.7s forwards;
    pointer-events: auto;
    max-width: 400px;
    text-align: center;
    backdrop-filter: blur(12px);
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== 回放播放器 ===== */
#replay-player.screen {
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
    background: var(--bg-primary);
}

.replay-player-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--bg-panel);
    border-bottom: 1px solid rgba(212, 168, 67, 0.15);
    flex-shrink: 0;
    position: relative;
    min-height: 52px;
}

.replay-player-header .back-btn {
    position: static;
    flex-shrink: 0;
}

.replay-player-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.replay-player-title span:first-child {
    font-weight: 700;
    color: var(--accent-gold);
    font-size: 1rem;
}

.replay-player-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.replay-player-scores {
    display: flex;
    gap: 10px;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.replay-player-scores .score-tag {
    padding: 3px 8px;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    white-space: nowrap;
}

.replay-player-scores .score-tag.win {
    background: rgba(76, 175, 80, 0.15);
    color: var(--win-color);
}

.replay-player-body {
    display: flex;
    flex: 1;
    overflow: hidden;
    gap: 12px;
    padding: 12px;
}

.replay-table-area {
    flex: 1;
    min-width: 0;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.replay-table {
    position: relative;
    width: auto;
    height: 100%;
    max-width: 760px;
    max-height: 570px;
    aspect-ratio: 4 / 3;
    background: radial-gradient(ellipse at center, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.replay-player-area {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.replay-player-area.top {
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
}

.replay-player-area.left {
    left: 8px;
    top: 50%;
    transform: translateY(-50%) rotate(90deg);
}

.replay-player-area.right {
    right: 8px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
}

.replay-player-area.bottom {
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
}

/* 三人回放：隐藏对家，左右上移 */
.replay-table.three-player .replay-player-area.top {
    display: none !important;
}
.replay-table.three-player .replay-player-area.left {
    top: 20%;
    transform: translateY(0) rotate(90deg);
}
.replay-table.three-player .replay-player-area.right {
    top: 20%;
    transform: translateY(0) rotate(-90deg);
}

.replay-player-info {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--bg-panel);
    border-radius: 16px;
    font-size: 0.7rem;
    white-space: nowrap;
}

.replay-player-info.current {
    box-shadow: 0 0 8px rgba(212, 168, 67, 0.4);
    border: 1px solid var(--accent-gold);
}

.replay-p-avatar {
    font-size: 1rem;
}

.replay-p-name {
    font-weight: 600;
}

.replay-p-score {
    color: var(--accent-gold);
    font-weight: 700;
}

.replay-hand {
    display: flex;
    gap: 3px;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 440px;
}

.replay-melds {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
}

/* ===== 回放播放器中的牌尺寸 ===== */
.replay-hand .mahjong-tile {
    min-width: 0;
    min-height: 0;
    width: 28px;
    height: 40px;
}

.replay-hand .mahjong-tile .tile-face {
    font-size: 1rem;
}

.replay-melds .mahjong-tile,
.replay-discard-pile .mahjong-tile {
    min-width: 0;
    min-height: 0;
    width: 24px;
    height: 34px;
}

.replay-melds .mahjong-tile .tile-face,
.replay-discard-pile .mahjong-tile .tile-face {
    font-size: 0.85rem;
}

.replay-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.replay-discard-pile {
    width: min(40vw, 220px);
    height: min(22vh, 120px);
    background: rgba(0, 0, 0, 0.15);
    border-radius: var(--border-radius-sm);
    padding: 6px;
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    align-content: flex-start;
    overflow-y: auto;
    border: 1px solid rgba(212, 168, 67, 0.1);
}

.replay-deck-info {
    display: flex;
    gap: 12px;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* 棋谱时间轴 */
.replay-timeline-panel {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    border: 1px solid rgba(212, 168, 67, 0.1);
    overflow: hidden;
}

.replay-timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    background: rgba(0,0,0,0.15);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-gold);
    border-bottom: 1px solid rgba(212, 168, 67, 0.1);
}

.replay-step-counter {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
}

.replay-timeline {
    flex: 1;
    overflow-y: auto;
    padding: 6px;
}

.replay-timeline-item {
    width: 100%;
    padding: 6px 10px;
    background: transparent;
    color: inherit;
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-left: 3px solid transparent;
    border-top: 0;
    border-right: 0;
    border-bottom: 0;
    font: inherit;
    text-align: left;
}

.replay-timeline-item:hover {
    background: rgba(212, 168, 67, 0.08);
}

.replay-timeline-item.active {
    background: rgba(212, 168, 67, 0.15);
    border-left-color: var(--accent-gold);
}

.replay-timeline-item .step-num {
    color: var(--text-muted);
    font-size: 0.7rem;
    min-width: 24px;
    text-align: right;
    font-family: monospace;
}

.replay-timeline-item .step-action {
    flex: 1;
}

.replay-timeline-item .step-player {
    font-size: 0.7rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.replay-action-detail {
    padding: 12px;
    background: rgba(0,0,0,0.15);
    border-top: 1px solid rgba(212, 168, 67, 0.1);
    min-height: 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.replay-action-text {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.replay-action-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* 播放控制栏 */
.replay-controls {
    flex-shrink: 0;
    padding: 10px 16px;
    background: var(--bg-panel);
    border-top: 1px solid rgba(212, 168, 67, 0.15);
}

.replay-progress-wrap {
    margin-bottom: 8px;
}

.replay-progress {
    width: 100%;
    -webkit-appearance: none;
    height: 32px;
    background: transparent;
    outline: none;
    cursor: pointer;
}

.replay-progress::-webkit-slider-runnable-track {
    height: 5px;
    background: var(--bg-secondary);
    border-radius: 3px;
}

.replay-progress::-moz-range-track {
    height: 5px;
    background: var(--bg-secondary);
    border-radius: 3px;
}

.replay-progress::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-gold);
    border-radius: 50%;
    cursor: pointer;
    margin-top: -4.5px;
}

.replay-control-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.replay-control-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.replay-control-group.center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.replay-ctrl-btn {
    padding: 8px 14px;
    background: var(--bg-secondary);
    border: 1px solid rgba(212, 168, 67, 0.2);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-fast);
    min-width: 40px;
    text-align: center;
}

.replay-ctrl-btn:hover {
    border-color: var(--accent-gold);
    color: var(--text-primary);
}

.replay-ctrl-btn:disabled,
.replay-progress:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.replay-ctrl-btn.primary {
    background: linear-gradient(135deg, var(--accent-gold-dark), var(--accent-gold));
    color: #1a1a1a;
    border: none;
    font-weight: 700;
    font-size: 1rem;
    padding: 8px 18px;
}

.replay-round-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 40px;
    text-align: center;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .replay-player-body {
        flex-direction: column;
    }
    .replay-timeline-panel {
        width: 100%;
        max-height: 35vh;
    }
    .replay-table {
        width: 100%;
        height: auto;
        max-width: 100%;
        max-height: 100%;
    }
    .replay-discard-pile {
        width: min(22vw, 90px);
        height: min(12vh, 90px);
    }
    .replay-control-group.center {
        position: static;
        transform: none;
    }
    .replay-control-bar {
        position: relative;
        justify-content: center;
        gap: 20px;
    }
    .replay-player-scores {
        display: none;
    }
    .replay-player-title {
        position: static;
        transform: none;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 560px) and (min-height: 601px) {
    .replay-table {
        aspect-ratio: 1 / 1;
    }
}

@media (max-height: 600px) {
    .replay-player-header {
        min-height: 48px;
        padding: 6px 10px;
    }
    .replay-player-body {
        flex-direction: row;
        gap: 6px;
        padding: 6px;
    }
    .replay-table {
        width: auto;
        height: 100%;
    }
    .replay-player-info {
        gap: 3px;
        padding: 2px 6px;
        font-size: 0.62rem;
    }
    .replay-p-avatar {
        display: none;
    }
    .replay-hand {
        gap: 1px;
        max-width: 220px;
        flex-wrap: nowrap;
    }
    .replay-hand .mahjong-tile {
        width: 14px;
        height: 20px;
        border-radius: 3px;
    }
    .replay-hand .mahjong-tile .tile-face {
        font-size: 0.55rem;
    }
    .replay-melds .mahjong-tile,
    .replay-discard-pile .mahjong-tile {
        width: 13px;
        height: 19px;
        border-radius: 3px;
    }
    .replay-center {
        gap: 4px;
    }
    .replay-discard-pile {
        width: 48px;
        height: min(13vh, 48px);
        padding: 3px;
        gap: 1px;
    }
    .replay-timeline-panel {
        width: 270px;
    }
    .replay-controls {
        padding: 6px 10px;
    }
    .replay-progress-wrap {
        margin-bottom: 4px;
    }
    .replay-ctrl-btn {
        min-width: 44px;
        padding: 6px 8px;
    }
}

@media (max-width: 560px) {
    .replay-controls {
        padding-left: 8px;
        padding-right: 8px;
    }
    .replay-control-bar {
        gap: 6px;
        justify-content: space-between;
    }
    .replay-control-group {
        gap: 4px;
    }
    .replay-ctrl-btn {
        width: 44px;
        min-width: 44px;
        padding-left: 4px;
        padding-right: 4px;
    }
    .replay-ctrl-btn.primary {
        padding-left: 4px;
        padding-right: 4px;
    }
    .replay-round-label {
        min-width: 34px;
    }
}

@media (max-width: 560px) {
    .game-title {
        font-size: 2rem;
    }
    .menu-btn {
        padding: 14px 18px;
    }
    .btn-text {
        font-size: 1rem;
    }
    .settings-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .screen {
        padding: 12px;
    }
    .achievements-grid {
        grid-template-columns: 1fr;
    }
    .mahjong-types {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 768px) {
    .screen {
        padding: 30px;
    }
    .menu-buttons, .stats-panel, .settings-section {
        max-width: 600px;
    }
    .game-title {
        font-size: 3rem;
    }
}

/* ========== 战绩页 ========== */

.stats-page-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
    flex: 1;
}

.stats-card {
    background: var(--bg-panel);
    border-radius: var(--border-radius);
    padding: 20px;
    border: 1px solid rgba(212, 168, 67, 0.1);
}

.stats-card h3 {
    margin: 0 0 16px 0;
    font-size: 1.1rem;
    color: var(--accent-gold);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 等级卡片 */
.level-card {
    background: linear-gradient(135deg, rgba(212, 168, 67, 0.08) 0%, rgba(139, 90, 43, 0.05) 100%);
    border: 1px solid rgba(212, 168, 67, 0.2);
}

.level-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.level-big {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent-gold);
    text-shadow: 0 0 20px rgba(212, 168, 67, 0.3);
}

.level-exp-detail {
    text-align: right;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.level-percent {
    display: block;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent-gold);
    margin-top: 2px;
}

.exp-bar-large {
    height: 10px;
    background: rgba(255,255,255,0.06);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 10px;
}

.exp-fill-large {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-gold), #e8c76a);
    border-radius: 5px;
    transition: width 0.6s ease;
}

.level-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

/* 概览网格 */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.overview-item {
    text-align: center;
    padding: 12px 8px;
    background: rgba(0,0,0,0.15);
    border-radius: var(--border-radius-sm);
}

.overview-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
    margin-bottom: 4px;
}

.overview-value.win { color: var(--win-color); }
.overview-value.lose { color: var(--lose-color); }

.overview-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.overview-detail {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.detail-row span:first-child {
    color: var(--text-secondary);
}

.detail-row span:last-child {
    font-weight: 600;
}

/* 成就迷你列表 */
.achievement-mini-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.achievement-mini {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--border-radius-sm);
    background: rgba(0,0,0,0.1);
    transition: var(--transition-fast);
}

.achievement-mini.unlocked {
    background: rgba(46, 125, 50, 0.08);
    border: 1px solid rgba(46, 125, 50, 0.15);
}

.achievement-mini.locked {
    opacity: 0.7;
}

.ach-mini-icon {
    font-size: 1.5rem;
    min-width: 36px;
    text-align: center;
}

.ach-mini-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.ach-mini-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.ach-mini-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.ach-mini-unlocked {
    font-size: 0.75rem;
    color: var(--win-color);
    font-weight: 600;
}

.ach-mini-bar-wrap {
    height: 4px;
    background: rgba(255,255,255,0.06);
    border-radius: 2px;
    margin-top: 4px;
    overflow: hidden;
}

.ach-mini-bar {
    height: 100%;
    background: var(--accent-gold);
    border-radius: 2px;
    transition: width 0.4s ease;
}

/* 历史战绩表 */
.history-table-wrap {
    overflow-x: auto;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.history-table th {
    text-align: left;
    padding: 10px 8px;
    color: var(--text-muted);
    font-weight: 500;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    white-space: nowrap;
}

.history-table td {
    padding: 10px 8px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    white-space: nowrap;
}

.history-table tr.win-row td {
    background: rgba(46, 125, 50, 0.04);
}

.history-table tr.lose-row td {
    background: rgba(198, 40, 40, 0.04);
}

.result-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.result-badge.win {
    background: rgba(46, 125, 50, 0.15);
    color: var(--win-color);
}

.result-badge.lose {
    background: rgba(198, 40, 40, 0.15);
    color: var(--lose-color);
}

/* 经验来源 */
.exp-source-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.exp-source-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px;
    background: rgba(0,0,0,0.08);
    border-radius: var(--border-radius-sm);
}

.exp-source-icon {
    font-size: 1.3rem;
    min-width: 28px;
    text-align: center;
}

.exp-source-item strong {
    color: var(--text-primary);
    font-size: 0.9rem;
}

.exp-source-example {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* 空状态 */
.stats-card .empty-state {
    text-align: center;
    padding: 30px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 响应式 */
@media (max-width: 560px) {
    .overview-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .level-big {
        font-size: 1.6rem;
    }
    .history-table {
        font-size: 0.75rem;
    }
    .history-table th,
    .history-table td {
        padding: 8px 6px;
    }
}

/* ===== iPhone X+ 安全区适配 ===== */
@supports (padding: max(0px)) {
    .screen {
        padding-top: max(16px, env(safe-area-inset-top));
        padding-bottom: max(16px, env(safe-area-inset-bottom));
    }

    #main-menu {
        padding-top: env(safe-area-inset-top);
    }

    #game-screen {
        padding-bottom: env(safe-area-inset-bottom);
    }

    .action-bar {
        padding-bottom: max(10px, env(safe-area-inset-bottom));
    }
}